From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: linux-arch@vger.kernel.org, Peter Zijlstra <peterz@infradead.org>,
Rusty Russell <rusty@rustcorp.com.au>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Ingo Molnar <mingo@kernel.org>,
"Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>,
Ralf Baechle <ralf@linux-mips.org>
Subject: [patch 10/18] mips: Use generic idle thread allocation
Date: Fri, 20 Apr 2012 13:05:51 -0000 [thread overview]
Message-ID: <20120420124557.512158271@linutronix.de> (raw)
Message-ID: <20120420130551.97tjIf6pCupsdK5IGI9wy46L8Ma1I35_4YR9d5cwZYY@z> (raw)
In-Reply-To: 20120420122120.097464672@linutronix.de
[-- Attachment #1: mips-use-generic-idle-thread-allocation.patch --]
[-- Type: text/plain, Size: 2449 bytes --]
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Ralf Baechle <ralf@linux-mips.org>
---
arch/mips/Kconfig | 1
arch/mips/kernel/smp.c | 54 -------------------------------------------------
2 files changed, 2 insertions(+), 53 deletions(-)
Index: linux-2.6/arch/mips/Kconfig
===================================================================
--- linux-2.6.orig/arch/mips/Kconfig
+++ linux-2.6/arch/mips/Kconfig
@@ -29,6 +29,7 @@ config MIPS
select HAVE_MEMBLOCK
select HAVE_MEMBLOCK_NODE_MAP
select ARCH_DISCARD_MEMBLOCK
+ select GENERIC_SMP_IDLE_THREAD
menu "Machine selection"
Index: linux-2.6/arch/mips/kernel/smp.c
===================================================================
--- linux-2.6.orig/arch/mips/kernel/smp.c
+++ linux-2.6/arch/mips/kernel/smp.c
@@ -186,61 +186,9 @@ void __devinit smp_prepare_boot_cpu(void
cpu_set(0, cpu_callin_map);
}
-/*
- * Called once for each "cpu_possible(cpu)". Needs to spin up the cpu
- * and keep control until "cpu_online(cpu)" is set. Note: cpu is
- * physical, not logical.
- */
-static struct task_struct *cpu_idle_thread[NR_CPUS];
-
-struct create_idle {
- struct work_struct work;
- struct task_struct *idle;
- struct completion done;
- int cpu;
-};
-
-static void __cpuinit do_fork_idle(struct work_struct *work)
-{
- struct create_idle *c_idle =
- container_of(work, struct create_idle, work);
-
- c_idle->idle = fork_idle(c_idle->cpu);
- complete(&c_idle->done);
-}
-
int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *tidle)
{
- struct task_struct *idle;
-
- /*
- * Processor goes to start_secondary(), sets online flag
- * The following code is purely to make sure
- * Linux can schedule processes on this slave.
- */
- if (!cpu_idle_thread[cpu]) {
- /*
- * Schedule work item to avoid forking user task
- * Ported from arch/x86/kernel/smpboot.c
- */
- struct create_idle c_idle = {
- .cpu = cpu,
- .done = COMPLETION_INITIALIZER_ONSTACK(c_idle.done),
- };
-
- INIT_WORK_ONSTACK(&c_idle.work, do_fork_idle);
- schedule_work(&c_idle.work);
- wait_for_completion(&c_idle.done);
- idle = cpu_idle_thread[cpu] = c_idle.idle;
-
- if (IS_ERR(idle))
- panic(KERN_ERR "Fork failed for CPU %d", cpu);
- } else {
- idle = cpu_idle_thread[cpu];
- init_idle(idle, cpu);
- }
-
- mp_ops->boot_secondary(cpu, idle);
+ mp_ops->boot_secondary(cpu, tidle);
/*
* Trust is futile. We should really have timeouts ...
next prev parent reply other threads:[~2012-04-20 13:05 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-20 13:05 [patch 00/18] SMP: Boot and CPU hotplug refactoring - Part 1 Thomas Gleixner
2012-04-20 13:05 ` [patch 01/18] m32r: Remove pointless function prototypes Thomas Gleixner
2012-04-20 13:05 ` [patch 02/18] smp: Add task_struct argument to __cpu_up() Thomas Gleixner
2012-04-20 13:05 ` Thomas Gleixner
2012-04-23 7:58 ` Jesper Nilsson
2012-04-23 7:58 ` Jesper Nilsson
2012-04-20 13:05 ` [patch 03/18] smp: Add generic smpboot facility Thomas Gleixner
2012-04-20 13:05 ` Thomas Gleixner
2012-04-20 20:07 ` Yinghai Lu
2012-04-20 20:07 ` Yinghai Lu
2012-04-21 2:07 ` Stephen Rothwell
2012-04-21 2:07 ` Stephen Rothwell
2012-04-20 13:05 ` [patch 04/18] smp: Provide generic idle thread allocation Thomas Gleixner
2012-04-20 13:05 ` Thomas Gleixner
2012-04-20 16:21 ` Sam Ravnborg
2012-04-20 16:21 ` Sam Ravnborg
2012-04-20 18:55 ` Thomas Gleixner
2012-04-20 18:55 ` Thomas Gleixner
2012-04-21 2:20 ` Stephen Rothwell
2012-04-21 2:20 ` Stephen Rothwell
2012-04-21 2:25 ` Frank Rowand
2012-04-21 2:25 ` Frank Rowand
2012-04-20 13:05 ` [patch 05/18] x86: Add task_struct argument to smp_ops.cpu_up Thomas Gleixner
2012-04-20 13:05 ` [patch 06/18] x86: Use generic idle thread allocation Thomas Gleixner
2012-04-20 13:05 ` [patch 07/18] powerpc: " Thomas Gleixner
2012-04-20 13:05 ` Thomas Gleixner
2012-04-20 13:05 ` [patch 08/18] ia64: " Thomas Gleixner
2012-04-20 13:05 ` [patch 09/18] arm: " Thomas Gleixner
2012-04-20 13:05 ` Thomas Gleixner
2012-04-20 13:05 ` [patch 11/18] hexagon: " Thomas Gleixner
2012-04-20 13:05 ` Thomas Gleixner
2012-04-24 16:47 ` Richard Kuo
2012-04-24 16:47 ` Richard Kuo
2012-04-20 13:05 ` Thomas Gleixner [this message]
2012-04-20 13:05 ` [patch 10/18] mips: " Thomas Gleixner
2012-04-20 13:05 ` [patch 12/18] s390: " Thomas Gleixner
2012-04-20 13:05 ` Thomas Gleixner
2012-04-23 7:09 ` Martin Schwidefsky
2012-04-23 7:09 ` Martin Schwidefsky
2012-04-20 13:05 ` [patch 13/18] blackfin: " Thomas Gleixner
2012-04-20 13:05 ` [patch 14/18] cris: " Thomas Gleixner
2012-04-23 7:57 ` Jesper Nilsson
2012-04-23 7:57 ` Jesper Nilsson
2012-04-20 13:05 ` [patch 15/18] sh: " Thomas Gleixner
2012-04-20 13:05 ` Thomas Gleixner
2012-04-21 3:18 ` Paul Mundt
2012-04-20 13:05 ` [patch 16/18] alpha: " Thomas Gleixner
2012-04-20 13:05 ` Thomas Gleixner
2012-04-20 13:05 ` [patch 17/18] parisc: " Thomas Gleixner
2012-04-20 13:05 ` Thomas Gleixner
2012-04-20 13:05 ` [patch 18/18] sparc: " Thomas Gleixner
2012-04-20 13:05 ` Thomas Gleixner
2012-04-22 19:52 ` David Miller
2012-04-20 13:16 ` [patch 00/18] SMP: Boot and CPU hotplug refactoring - Part 1 Thomas Gleixner
2012-04-20 13:21 ` Peter Zijlstra
2012-04-20 13:47 ` Thomas Gleixner
2012-04-21 0:08 ` Suresh Siddha
2012-05-03 9:41 ` Thomas Gleixner
2012-05-03 9:41 ` Thomas Gleixner
2012-05-03 23:42 ` Suresh Siddha
2012-04-20 15:42 ` Tejun Heo
2012-04-20 15:49 ` Peter Zijlstra
2012-04-20 15:56 ` Thomas Gleixner
2012-04-20 13:56 ` Srivatsa S. Bhat
2012-04-20 14:18 ` Thomas Gleixner
2012-04-24 18:44 ` Konrad Rzeszutek Wilk
2012-05-21 1:42 ` Rusty Russell
2012-05-21 8:25 ` Thomas Gleixner
2012-05-21 8:25 ` Thomas Gleixner
2012-05-22 0:53 ` Rusty Russell
2012-04-20 14:06 ` richard -rw- weinberger
2012-04-20 14:06 ` richard -rw- weinberger
2012-04-20 14:19 ` Thomas Gleixner
2012-04-20 14:27 ` James Bottomley
2012-04-20 17:55 ` Paul E. McKenney
2012-04-20 23:11 ` Venki Pallipadi
2012-04-21 1:04 ` Frank Rowand
2012-04-21 1:55 ` Frank Rowand
2012-04-22 21:01 ` Chris Metcalf
2012-04-22 21:01 ` Chris Metcalf
2012-04-30 8:05 ` Santosh Shilimkar
2012-04-30 8:05 ` Santosh Shilimkar
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